Jaywalker_Holmes

Ren, a modern doctor and a secret master magician, suddenly finds himself inside a random book he picked up at the airport...as the villainous older brother of the protagonist. As the bad guy, he's supposed to make life difficult for the Male Lead until the latter grows up and kills him in revenge. However, looking at the broken teenager in front of him, Ren can't help but feel his heart soften. 
Fang was an orphan who had never known what a family is. Abandoned at birth, all he knew was pain and fear. He loved nothing, and wanted nothing...until he saw the angelic Wade. To save Wade, Fang didn't hesitate to sacrifice himself. ..after all, there was no one to cry over him.
But then, Ren appeared and turned his world upside down.

The Villain Saves the Male Lead

"Pleasure," Ren said, shaking hands with Prince Uno.

"However," Prince Uno said, not letting go of Ren's hand. "How are you going to move forward now that you know that Cousin Fang isn't a simple orphan who needs to rely on you all the time? Will your messiah complex be able to cope up with it, now that Cousin Fang is going to be richer and more famous and more prestigious than you? Are you going to be able to let him be the superior one in your relationship, Chairman Ren?"

Ren blinked. "Fang has always been the superior one in our relationship," he said frankly. "It's just that now the world knows it, instead of just me."

Prince Uno narrowed his eyes. "Are you certain?" he demanded. "Would your ego be able to take it? You can't be the sugar daddy to the little orphan boy anymore, can you?"

Before Ren could reply, Fang slipped an arm around Ren's waist and pulled him into his arms protectively, effectively pulling out Ren's hand from Prince Uno's grip.

161 – The Babies Meet The New Family